INTERFACES

 

DTE-DCE INTERFACE

Four basic functional units:

Figure 2.1

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Data Terminal Equipment (DTE)

Data Circuit-Terminating Equipment (DCE)

  • A DCE is any device that transmits or receive data in the form of an analog or digital signal though a network.
  • At the physical layer, a DCE will converts the data generated by DTE to introduce them onto the telecommunication link.
  • It is as if your mouth that speak up

    Related links:
    http://www.htl-steyr.ac.at/~_morg/pcinfo/hardware/tech8g11.htm


note: When it makes sense

Standards

Figure 2.2

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:

figure 2.1

The DTE generates the data and passes them, along with necessary control characters, to a DCE. The DCE converts the signal to a format appropriate to the transmission medium and introduces it onto the network link. When the signal arrives at the receiving end, This process is reversed.
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    figure 2.2

    The EIA (Electronic Industries Association) and the ITU-T (International Telecommunication Union- Telecommunication Standards Committee) have been involved in developing DTE-DCE interface standards.
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    • The EIA standards are called EIA-232, EIA-442, EIA-449 and so on.
    • The ITU-T standards are called the V series and the X series.

    When it makes sense
    • In order to understand the data, both ought to speak the same "language" modulating method).
    • Although "the brains" (DTE) do not need to be coordinated with each other, but every "brains" have to coordinates with its own "mouth" (DCE).
    • In order that, the things we say "make sense" integrity).
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    EIA-232
    • EIA-232(previously called RS-232 issued in 1962) defines the mechanical,electrical and functional characteristics of the interface between a DTE and a DCE.
    Other Links to EIA-232:
    http://www.rad.com/networks/1995/rs232/rs232.htm http://www.cit.ac.nz/smac/dc100www/dc_008.htm

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